O I see usr/lib directory does exists for me in recipe-sysroot-native too, but not in recipe-sysroot.
Think mesa configure may be utilizing the version of llvm-config in recipe-sysroot and
not recipe-sysroot-native.

mesa/2_22.2.2-r0/mesa-22.2.2# ldd ../recipe-sysroot-native/usr/bin/llvm-config
   linux-vdso.so.1 (0x00007ffe7b5cb000)
   libpseudo.so => /../../../../../../../tmp/sysroots-components/x86_64/pseudo-native/usr/lib/pseudo/lib64/libpseudo.so (0x00007f4d138ed000)
   libtinfo.so.5 => /../../../../../../../tmp/work/amd64-northstar-linux/mesa/2_22.2.2-r0/mesa-22.2.2/../recipe-sysroot-native/usr/bin/../lib/libtinfo.so.5 (0x00007f4d138bd000)
   libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f4d1367d000)
   libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f4d13594000)
   libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f4d13574000)
   libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f4d1334c000)
   libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f4d13347000)
   libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f4d13342000)
    /../../../../../../../tmp/sysroots-uninative/x86_64-linux/lib/ld-linux-x86-64.so.2 => /lib64/ld-linux-x86-64.so.2 (0x00007f4d13994000)

mesa/2_22.2.2-r0/mesa-22.2.2# ldd ../recipe-sysroot/usr/bin/llvm-config
   linux-vdso.so.1 (0x00007ffc5bc95000)
   libpseudo.so => /../../../../../../../tmp/sysroots-components/x86_64/pseudo-native/usr/lib/pseudo/lib64/libpseudo.so (0x00007f1c6c02b000)
   libtinfo.so.5 => /../../../../../../../tmp/work/amd64-northstar-linux/mesa/2_22.2.2-r0/mesa-22.2.2/../recipe-sysroot/usr/bin/../../lib64/libtinfo.so.5 (0x00007f1c6bffb000)
   libstdc++.so.6 => /../../../../../../../tmp/work/amd64-northstar-linux/mesa/2_22.2.2-r0/mesa-22.2.2/../recipe-sysroot/usr/bin/../lib64/libstdc++.so.6 (0x00007f1c6bdd7000)
   libm.so.6 => /../../../../../../../tmp/work/amd64-northstar-linux/mesa/2_22.2.2-r0/mesa-22.2.2/../recipe-sysroot/usr/bin/../../lib64/libm.so.6 (0x00007f1c6bcfb000)
   libgcc_s.so.1 => /../../../../../../../tmp/work/amd64-northstar-linux/mesa/2_22.2.2-r0/mesa-22.2.2/../recipe-sysroot/usr/bin/../../lib64/libgcc_s.so.1 (0x00007f1c6bcdb000)
   libc.so.6 => /../../../../../../../tmp/work/amd64-northstar-linux/mesa/2_22.2.2-r0/mesa-22.2.2/../recipe-sysroot/usr/bin/../../lib64/libc.so.6 (0x00007f1c6bafd000)
   libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f1c6bae2000)
   libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f1c6badb000)
   /../../../../../../../tmp/sysroots-uninative/x86_64-linux/lib/ld-linux-x86-64.so.2 => /lib64/ld-linux-x86-64.so.2 (0x00007f1c6c0d2000)

../mesa/2_22.2.2-r0/mesa-22.2.2# which llvm-config
/../../../../../../../tmp/work/amd64-northstar-linux/mesa/2_22.2.2-r0/recipe-sysroot/usr/bin/crossscripts/llvm-config

../mesa/2_22.2.2-r0/mesa-22.2.2# llvm-config --version
15.0.1

../mesa/2_22.2.2-r0/mesa-22.2.2# llvm-config --libdir
/../../../../../../../tmp/work/amd64-northstar-linux/mesa/2_22.2.2-r0/recipe-sysroot/usr/lib64

../mesa/2_22.2.2-r0/mesa-22.2.2# ls /../../../../../../../mesa/2_22.2.2-r0/recipe-sysroot/usr/
bin include lib64 share

*****************************************************************************************************************************

../mesa/2_22.2.2-r0/mesa-22.2.2# ../recipe-sysroot-native/usr/bin/llvm-config --version
15.0.1

../mesa/2_22.2.2-r0/mesa-22.2.2# ../recipe-sysroot-native/usr/bin/llvm-config --libdir
/../../../../../../../tmp/work/amd64-northstar-linux/mesa/2_22.2.2-r0/recipe-sysroot-native/usr/lib64

../mesa/2_22.2.2-r0/mesa-22.2.2# ls /../../../../../../../tmp/work/amd64-northstar-linux/mesa/2_22.2.2-r0/recipe-sysroot-native/usr/
bin include lib libexec sbin share

My apologies mesa configure utilizes the bin in recipe-sysroot not recipe-sysroot-native.